From: Chris Lattner <sabre@nondot.org>
Date: Thu, 19 Feb 2004 18:34:02 +0000 (+0000)
Subject: Fix problem fusing spill code into instructions: we didn't update the live
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d368c6163a54190c852838b370a62a86caafde3a;p=oota-llvm.git

Fix problem fusing spill code into instructions: we didn't update the live
variable information to take into account the change of instruction
address.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11628 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/RegAllocLocal.cpp b/lib/CodeGen/RegAllocLocal.cpp
index cbbc7c22997..188b3b34170 100644
--- a/lib/CodeGen/RegAllocLocal.cpp
+++ b/lib/CodeGen/RegAllocLocal.cpp
@@ -496,6 +496,9 @@ MachineInstr *RA::reloadVirtReg(MachineBasicBlock &MBB, MachineInstr *MI,
     MachineBasicBlock::iterator MII = MI;
     if (RegInfo->foldMemoryOperand(MII, OpNum, FrameIndex)) {
       ++NumFused;
+      // Since we changed the address of MI, make sure to update live variables
+      // to know that the new instruction has the properties of the old one.
+      LV->instructionChanged(MI, MII);
       return MII;
     }